W-Band OFDM for Radio-over-Fiber Direct-Detection Link Enabled by Frequency Nonupling Optical Up-Conversion

IEEE Photonics Journal

S. E. Alavi¹  N. Fisal¹  A. S. M. Supa'at²  S. M. Idrus²  I. S. Amiri³  H. Ahmad³  M. Khalily⁴ 

[1] Fac. of Electr. Eng., Univ. Teknol. Malaysia (UTM), Skudai, Malaysia;Lightwave Commun. Res. Group, Univ. Teknol. Malaysia (UTM), Skudai, Malaysia;Photonics Res. Centre, Univ. of Malaya, Kuala Lumpur, Malaysia;Wireless Commun. Center (WCC), Univ. Teknol. Malaysia (UTM), Skudai, Malaysia;

关键词: W-band;    Orthogonal Frequency Division Multiplexing (OFDM);    Radio-over-Fibre;    External Modulation;   

DOI  :  10.1109/JPHOT.2014.2366166

来源: DOAJ

【 摘 要 】

A system involving W-band (75-110 GHz) optical millimeter (mm)-wave generation using the external optical modulator (EOM) in a radio-over-fiber (RoF) link is presented for satisfying the requirements for multi-gigabit-per-second data rates. A 90-GHz mm-wave signal was generated by a nonupling (nine times) increase in only a 10-GHz local oscillator by biasing the EOM at its zero level and choosing an appropriate modulation index. To achieve a fast transmission speed wirelessly, high spectral efficiency (SE), and better transmission performance, orthogonal frequency-division multiplexing (OFDM) is used. The bit error rate (BER) and error vector magnitude (EVM) of the system were measured for three different fiber lengths and for a wireless distance of 1-5 m. The results show that the system with the SE of ~4 (b/s)/Hz and 16-ary quadrature amplitude modulation (QAM) 40-GB/s OFDM signals can be received by the end user with BER less than 3.8 × 10^-3 and EVM less than 25% over a 50-km optical fiber and 3-m wireless link.

【 授权许可】

Unknown